body {
    min-width: 320px;
    max-width: 750px;
    margin: 0 auto;
    background-color: #fff;
}
a {
    text-decoration: none;
    color: #707070;
}
// 约束当屏幕大于750px的时候，html字体大小就不再变化了
@media screen and (min-width:750px) {
    html {
        font-size: 37.5px!important;
    }
}
.header {
    height: 2.133333rem;
    border-bottom: .0267rem solid #eaeaea;
    text-align: center;
    line-height: 2.133333rem;
    font-size: .9333rem;
    color: #1c1c1c;
    // margin-bottom: 2.1333rem;
}
.section {
    width: 100%;
    height: 31.92rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    .item {
        width: 6.5867rem;
        height: 6.5867rem;
        margin-top: 2.1333rem;   
        background-color: #dcf8ff;
        border: .0267rem rgb(46, 166, 247) dashed;
        .nav {
            width: 6.5333rem;
            height: 6.5333rem;
            border-radius: 6.5333rem;
            background-color:#f5f4f5;
            overflow: hidden;
            text-align: center;
            img {
                width: 100%;
                height: 4.0533rem;
            }
            h5 {
                margin-top: .6667rem;
                font-size: .8533rem;
                color: #52c4f0;
            }
        }
    } 
}